Buyer's Guide
| Company | Location | Company Type |
|---|---|---|
| Chester Paul Company | Glendale | Distributor |
| Chlorinators Incorporated | Stuart | Manufacturer |
| Chromalox, Inc. | Pittsburgh | Manufacturer |
| Cla-Val | Costa Mesa | Manufacturer |
| Clack Corporation | Windsor | Manufacturer |
| Clark Solutions | Hudson, Massachusetts, United States | Manufacturer |
| Clark-Cooper Division | Cinnaminson | Manufacturer |
| Clearion Water Technologies | Ashland, Ohio, United States | Manufacturer |
| ClearWater Enviro Technologies, Inc. | Clearwater | Manufacturer |
| ClearWater Tech, LLC | San Luis Obispo | Manufacturer |
| Compac Engineering Inc. | Paradise | Manufacturer |
| CoolerSmart | New Castle | Manufacturer |
| Coral, LLC | Incline Village | Manufacturer |
| Cornell Pump Company | Portland | Manufacturer |
| Corrosion Control Products Co. | Gardena | Distributor |
| Corrpro | Medina | Manufacturer |
| Coway USA | Los Angeles | Manufacturer |
| Crane Environmental | Venice | Manufacturer |
| Crane Pumps & Systems | Piqua | Manufacturer |
| Critical Process Filtration Inc | Nashua | Manufacturer |
| Croll-Reynolds Engineering Company, Inc. | Trumbull | Manufacturer |
| Cromaglass Corp. | Williamsport | Manufacturer |
| Crystal Mountain Products Limited | Edmonton | Manufacturer |
| Crystal Quest | Kennesaw | Manufacturer |
| CSI (Chandler Systems Inc.) | Ashland | Manufacturer |
